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Metallic quantum criticality enabled by flat bands in a kagome lattice
Lei Chen, Fang Xie, Shouvik Sur +4
Strange metals arise in a variety of platforms for strongly correlated electrons, ranging from the cuprates, heavy fermions to flat band systems. Motivated by recent experiments in…
Signature of Correlated Insulator in Electric Field Controlled Superlattice
Jiacheng Sun, Sayed Ali Akbar Ghorashi, Kenji Watanabe +4
The Bloch electron energy spectrum of a crystalline solid is determined by the underlying lattice structure at the atomic level. In a 2-dimensional (2d) crystal it is possible to i…
Pressure--enhanced fractional Chern insulators in moiré transition metal dichalcogenides along a magic line
Nicolás Morales-Durán, Jie Wang, Gabriel R. Schleder +5
We show that pressure applied to twisted WSe can enhance the many-body gap and region of stability of a fractional Chern insulator at filling . Our results are based on…
Symmetry constraints and spectral crossing in a Mott insulator with Green's function zeros
Chandan Setty, Shouvik Sur, Lei Chen +5
Lattice symmetries are central to the characterization of electronic topology. Recently, it was shown that Green's function eigenvectors form a representation of the space group. T…
Mott insulators with boundary zeros
Niklas Wagner, Lorenzo Crippa, Adriano Amaricci +9
The topological classification of electronic band structures is based on symmetry properties of Bloch eigenstates of single-particle Hamiltonians. In parallel, topological field th…
Emergent flat band and topological Kondo semimetal driven by orbital-selective correlations
Lei Chen, Fang Xie, Shouvik Sur +4
Flat electronic bands are expected to show proportionally enhanced electron correlations, which may generate a plethora of novel quantum phases and unusual low-energy excitations.…